316000561 has 2 divisors, whose sum is σ = 316000562. Its totient is φ = 316000560.

The previous prime is 316000543. The next prime is 316000583. The reversal of 316000561 is 165000613.

It is an a-pointer prime, because the next prime (316000583) can be obtained adding 316000561 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311875600 + 4124961 = 17660^2 + 2031^2 .

It is a cyclic number.

It is not a de Polignac number, because 316000561 - 2⁹ = 316000049 is a prime.

It is not a weakly prime, because it can be changed into another prime (316000961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158000280 + 158000281.

It is an arithmetic number, because the mean of its divisors is an integer number (158000281).

Almost surely, 2^316000561 is an apocalyptic number.

It is an amenable number.

316000561 is a deficient number, since it is larger than the sum of its proper divisors (1).

316000561 is an equidigital number, since it uses as much as digits as its factorization.

316000561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 316000561 is about 17776.4046139820. The cubic root of 316000561 is about 681.1288638415.

The spelling of 316000561 in words is "three hundred sixteen million, five hundred sixty-one", and thus it is an aban number.